For more than 50 years of rotary wing aviation, lots of helicopters have come and gone from the U.S. military. But only one is still in service — the H-1 “Huey.”
Technically there are two versions of the Huey still flying, the UH-1Y Venom and AH-1Z Viper — both in service with the Marine Corps. These aircraft are heavily updated from their initial production models but will be in service with the Marines for years to come.